Machine for forming cores for pipe-sockets.



w. H. LARRISON. MACHINE FOR FORMING OORES FOR PIPE SOCKETS.

APPLIOATION FILED FEB. 18, 190B.

Patented Aug. 24, 1 909.

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W. H. LARRISON. MACHINE FOR FORMING GORES'FOR PIPE SOCKETS APPLICATIONFILED FEB. 18, 1908. 932,402. Patented Aug. 24,1909. a SHEETS-SHEET 2.

INVENTORI W. H. LARRISON.

MACHINE FOR, FORMING 00338 FOR PIPE SOCKETS.

APPLICATION FILED PEB.18, 190s.

Patented Aug. 24, 1909.

3 SHEETS-SHEET 3.

JTICf m 29/ 52 Hill" ZZZ UNITED STATES PATENT orrion.

WILLIAM H. LARRISON, 0F FLORENCE, NEW JERSEY,- ASSIGNOR TO FLORENCE IRONWORKS, 0F FLORENCE, NEW JERSEY, A CORPORATION OF NEW JERSEY.-

MACHINE FOR FORMING OOBES FOR PIPE-SOCKETS.

T 0 all whom it may concern:

Be it known that I, VVILLIAM II. LARRISON, of Florence, in the county ofBurlington and State of New Jersey, have invented certain new and usefulImprovements in Machines for Forming Cores for Pipe-Sockets, whereof thefollowing is a specification, reference being had to the accompanyingdrawings.

The general purposes of my invention are to provide means for forciblycompressing the material, (usually sand) out of which such cores aremade, so as to mold it into a dense and coherent mass, to afiord readyaccess to the molding parts for the introduction of material and removalof the cores, and to so control the pressure Producing devices and theircooperating elements as to prevent injury from untimely action.

In the accompanying drawings, Figure I, is a front elevation of themachine. Fig. II, is an end elevation as seen from the left hand side ofFig. I. Fig. III,is a corresponding elevation as seen from the righthand end of Fig. I. To avoid confusion, in these two last mentionedfigures, certain remote parts which in each instance would be to a greatextent concealed by reason of the intervention of parts nearer theobserver have been indicated. Fig. IV, is a vertical sectional view onthe line IV, IV, of Fig. I. Figs. V, and VI, are transverse sectionalviews respectively on the lines V, V, and VI, VI of Fig. IV. Figs. VII,and VIII, are views in perspective of the interior elements of the moldproper.

Broadly speaking, the machine comprises the following main groups ofelements; a mold whose surrounding wall is formed in two separableparts, hinged together, and whose interior is provided with a mold-ringhaving a separable closed extension piece; a

normally stationary plunger, of annular crosssection, supported upon aswinging frame; and hydraulic pressure mechanism, whereby the mold andits contents may be forced against said plunger.

Referring to the drawings, 1, represents the base, which is prismatic inform, having sides which converge toward the upper portion, and which isbolted to the girders 2, 2. The base is provided at its ends, withhorizontally projecting trunnions 3, 3, which support the swingingframe, comprising uprights 4, 4, and a horizontal cross-head 6.

The upright-s consist of channel irons, the

Specification of Letters Patent. Patented Aug 24 1909.

Application filed February 18, 1908.

Serial No. 416,571.

upper portions of whose proximate surfaces are provided with downwardlyfacing serrations 5.

The cross head 6, is composed of two similar channel irons connected attheir ends by means of bolts 7 which pass through dis tance pieces 8,having flanges 9, which fit snugly in the channels of the uprights 4.The cross head is clamped in position by means of a longitudinal rod 10,having threaded end portions which engage in suitable openings in thedistance pieces, the uprights 4, being slotted, as shown at 11, topermit the cross head and its rod 10, to be shifted vertically. Thecross head is provided with a handle 12, by means of which the frame maybe swung upon its trunnions. T -shaped blocks 13 are mounted on thecross head, the downwardly depending portions 14, of said blocks beingserrated in such relation to the serrations 5, of the uprights, as toengage therewith and thus afford a firm abutment against upward thrust.

At the lower portion of one of the up rights 4, is rigidly secured alaterally projecting arm 16, which is pivoted to lugs 17, mounted on thebottom of a plunger 18, which engages with a strong spring 19, shown indotted lines, said spring being con tained within a casing 20, mountedupon one end of the base 1.

At the longitudinal center of the cross head 6, is secured thedownwardly depending annular plunger 21, having an orifice 22, to permitthe escape of air from the interior, during the act of compression. Atthe central portion of the base 1, which is subjacent to this annularplunger 21, is mounted a stationary cylindrical piston 25, having acentral duct 26, to admit the hydraulic pressure medium, and upon thispiston is fitted a vertically movable bottom cylinder 27, upon the topof which the base plate 29, of the mold cylinder 28, is secured. Thismold-cylinder 28, is longitudinally divided into two similar parts thewalls being reinforced by the ribs 31, 32, 33, which respectively affordseats for a-pin 34, whereby the two halves of the mold are pivotallysecured together, said pin being fixedly mounted in the base plate 29.One of said ribs also affords a seat for a pin 35, upon which a hasp 36,is pivotally mounted, said hasp engaging with a lug 37, upon theadjacent face of the other half cylinder. At the bottom of the moldcylinder is an inwardly projecting annular flange 30, which fits closelyaround a flat boss 42, on the base-plate 29. The in terior surface ofthe mold cylinder has the configuration shown, that is to say, the sidesextend vertically downward three-fourths of the total depth, at whichregion an angular groove 40, is formed, and below this groove thesurface extends vertically down to the flange 30.

The internal molding element comprises a ring 4 1-, which rests upon theflange 30, and has an external projecting flange 15, which fits snuglywithin the walls of the mold cyl inder 28, when the two parts of thelatter are closed and locked together. By reference to the cross sectionof the ring shown in Fig. IV, it will be seen that the exterior surfaceis slightly conical and that the inte rior opening thereof flaresoutwardly at its upper portion, so that the upper extremity is reducedto a narrow edge 46. This edge receives and supports the closedextension piece 50, whose lower extremity converges inwardly, as shownat 51, a horizontal shoulder 52, being formed above the convergingportion, which shoulder rests upon the edge 46-, of the ring as. Thevertical depth of the extension piece above said shoulder issubstantially equal to the vertical depth of the cavity between theexternal surface of the ring 14:, and the adjacent surrounding wall ofthe mold cylinder 28, so that the total interspace can contain a bulk ofmaterial which. in its uncompressed form, is about twice the depth ofthe core to be formed therefrom. The lower edge of the annular plunger21, fits snugly in this interspace, and hence when the mold is forcedupward against said plunger, a complete compression of the materialcontained in the interspace will occur. As before stated, the mold isthus actuated by means of hydraulic pressure applied to the cylinder 27,and the con trolling'mechanism for the hydraulic pressure system willnow be described. Y

The duct 26, in the stationary piston 25, communicates with a pipe 60,which leads to a valve box 61, to which the pressure supplying medium isadmitted, by means of the pipe 68, connected with the source ofpressure, not shown; the exhaust pipe is indieated' at 62;. The valvebox 61, is provided with a rotary valve, whose stem 63, extendsvertically upward. On this stem is actuating lever 64, which isprolonged beyond the point of attachment with the stem, and carries asegment 65, having a downwardly projecting flange 66. A stop pin 67,limits the movement of the lever in one direction. Mounted upon one ofthe uprights 4, at 70, is a forwardly projecting guard arm 71, having alongitudinally curved and laterally extended flat upper surface 72. At apoint immediately adjacent to the upright 4, a

vertical notch 73, is formed in the upper surface of the guard arm,which notch receives the downwardly depending flange 66, of the segment,carried by the controlling lever 6%., of the valve. It will thus be seenthat when the swinging frame is in a true vertical position, so that theplunger is centered accurately above the mold, the flange 66, of thesegment 65, is received freely within the notch 73, and hence the levercan be shifted in either direction. The frame, however, cannot be movedwhile the flange 66, is thus seated within the notch 7 This engagementof the rib within the notch, corresponds to the positions of the valveduring the whole period from the inception of its opening until it iscompletely opened. Hence, while the valve is wholly or partly opened,the frame cannot be swung from the vertical, and any danger of forcingthe hydraulic cylinder upward when the plunger is not accuratelycentered above the mold, is absolutely prevented. When, however, thevalve is completely closed by swinging the lever 64, until it abutsagainst the stop 67, the flange 66, is withdrawn from the notch 7 3, andhence the frame can be swung upon its trunnions. During this swingingmovement, however, the end of the flange 66, upon the segment of theactuating lever abuts against the side of guard arm 71, and so long asthis position of the parts continues the lever cannot be moved, beinglocked in closed position, between the stop 67, and the guard arm 71. Bythis mutual interlocking of the frame on the one hand, and thecontrolling lever of the hydraulic system on the other, carelessmanipulation of the apparatus and injury are avoided.

In the regular operation of the apparatus, after the compression of thecore has been effected, the cylinder 27, is permitted to descend, andthe frame is swung from beneath the plunger, the mold cylinder beingopened to permit the removal of the core and internal molding elements,after which theparts are replaced and the mold is recharged. Theswinging of the frame is against the tensions of the spring 19, whosecounterbalancing action prevents the frame from falling or tilting toofar, and also lessens the effort necessary to restore it to normalposition.

Having thus described my improvements in their complete embodiment, I,claim 1. The combination with the base and with the piston and cylindercarried thereby and provided' with actuating means; of a mold-cylinderopen at the top; a moldring mounted in said cylinder;-a swingingframe;and an annular plunger mounted on said frame in operative relation tothe mold cylinder.

2. The combination with the annular pliun ger; of a two partmoldcylind'er 5 a moldring mounted therein and provided with an annularflange around its lower periphery, which fits snugly against the innersurface of the mold-cylinder; a cylindrical extension piece having adiameter similar to the diameter of the upper extremity of the moldringand carried by the mold-ring; and actuating devices for effectingrelative movement of said plunger and said mold-cylinder.

3. The combination with the annular plunger; of a two part moldcylinder; a moldring mounted therein, having an annular flange aroundits lower periphery which fits snugly against the inner surface of themoldcylinder and having an upwardly converging exterior surface; acylindrical extension piece having a shoulder adapted to rest upon theupper edge of the mold-ring, the external surface of the extension piecebeing flush with the external surface of the mold ring at the upperextremity of the latter; an annular plunger fitting snugly in theinterspace between the mold-cylinder and the extension piece; andactuating devices for effect-ing relative movement of said plunger andsaid mold-cylinder.

i. The combination of the two-part moldcylinder; of a mold-ring providedwith an annular flange around its lower periphery, which fits snuglyagainst the inner surface of the mold-cylinder, said mold-ring havingits entire exterior surface converging upwardly and having the upperportion of its interior surface flaring outwardly, whereby a narrow edgeis formed at the upper periphery of said mold-ring; a cylindricalextension piece having an inwardly converging surface at its lowerextremity; a shoulder immediately above said converging surface, adaptedto rest upon the narrow edge of the mold-ring, the outer surface of saidextension piece being flush with the outer surface of the mold-ring atthe upper extremity of the latter; an annular plunger fitting snugly inthe interspace between the mold-cylinder and the extension piece; andactuating devices for efiecting relative move ment of said plunger andsaid mold-cylinder.

In testimony whereof, I have hereunto signed my name, at PhiladelphiaPennsylvania, this thirtieth day of January 1908.

WILLIAM H. LARRISON.

WVitnesses:

JAMES H. BELL, E. L. FULLERTON.

